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Old 09-04-2010, 06:39 AM   #1
Mr. Alex
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Question ext4 journal, question about levels

There are 3 of them:

Do I understand it correct - "writeback" provides best performance and you can lose data easily. "Journal" provides worst performance and best data protection. "Ordered" is something between them, average.

To mount ext4 is fstab in "journal" mode should I save the line as
/dev/sda2   /       ext4   defaults,data=journal   0   1
Do I need "defaults" here?
Old 09-04-2010, 11:58 AM   #2
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you should change that with tune2fs

not in fstab

defaults are needed unless you want to change them

see man mount

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Old 09-05-2010, 02:05 PM   #3
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This is about ext3, but it should clarify your question.


ext4, file, journal, system

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